Rotary conical valve for internal-combustion motors.



O. B. CAMPBELL, JR.

ROTARY GONICAL VALVE FOR INTERNAL COMBUSTION MOTORS.

APPLICATION FILED MAR. 26, 1912.

1,139,953., Patented M51318, 1915.

ATTORNEY,

OSMON B. CAMPBELL, .13., or KANSAS CITY, mxssormr.

ROTARY conrcan .YALYE r012. INTERNAL-COMBUSTION MOTORS.

' Specification of Letters Patent.

Patented May 18, 1915.

Application filed March 26, 1912. Serial No. 686,228.

To all whom it may concern:

Be it known that I, OSMON B. CAMPBELL, J r., a citizen of the UnitedStates of America, residing at 3508 Baltimore avenue, Kansas City, inthe county of Jackson and Stateof Missouri, have invented certain newand useful Improvements in Rotary 'Qonical Valves forInternal-Combustion Motors, of which the following is a specification;

If a cone shaped valve is not provided with self adjusting means, it maybe made to fit gas tight when cold, but when it becomes Warm it willbind or stick in its housing. Or, if provision is made for the expansionofthe valve, so that the fit will be perfectly gas tight when warm andyet not stick, the valve must be made to fit loosely in the housing whencold: thus the valve will not be gas tight when cold.

The object of my invention is to provide a valve for an internalcombustion motor that will be gas tight both when hot and when cold andwhich will not bind or stick in the housing when it expands as a resultof becoming heated. I accomplish my object by the mechanism illustratedin the accompanying drawings, in which,-

Figure 1 is a sectional elevation of my rotary conical valve an Fig.2 isa cross section of the same cut on line m-m of Similar letters ofreference indicate corresponding parts these specifications.

The valve consists of two parts: a rotating male member B and a housingfemale member B. jacket B Said rotating member consists of a hollow coneshaped chamber having a cylindrical portion D extending from the apexend of said cone, a thrust bearing F and port H in the wall of the'conefor admitting and discharging gas into and from the clearance space orcombustion chamber H. The inside of housing B conforms in shape to theshape of the outside of said rotating member and is provided with portsI I which register with the port in said rotating member.

In Fig. 2 I show, approximately, the position of the ports in thevalve.Port H in the rotating member registers alternately with exhaust andintake ports I and I in the housing. The space from the center of saidexhaust port to the center of the inin said drawings and in fore theangle Y These are inclosed in a water' take port is, approximately,equal to one-,

fourth of the circumference of the cone.

Said port H in the rotating member has four sides; oneis narrower thanthe other and the port is much longer than it is wide. 1

The rotating memberis placed within the clearance space of an internalcombustion motor the upper portion of the engine cylinder thus formingthe housing for said rotating member the axis of the cone lying with theaxis of the engine cylinder. Said thrust bearing F must be at the pointin a plane with the point 0 at which said apex of the cone would fall ifthe cone were extended as shown by dotted lines in Fig. 1, instead ofbeing merged with the cylindrical port1on. l

The valve is adapted to rotate at one-half the crank shaft speed and bythe self adj ust ing properties possessed by said valve a gas tightobtained at all temperatures: this adjustability is based von thephysical law that different lengths of like substances expand the sameproportion of their respective lengths for equal rises in temperature,and on the. mathematical law: triangle the same proportion of theirrespective lengths and a larger but similar triangle results. In mydrawing consider for the moment the conical portion and the dotted apexto be aplain triangle-A; O E. Point O is fixed; extend all sides thesame proportion of their respective lengths and a larger but similartriangle results: theredoes not change. The extended triangle may beconsidered to be 0 A E and as the angle Y has not been changed and thepoint 0 is fixed, the sides 0 E and O A lie along the housing, as beforethe extension. The lateral expansion of the valve has been offset by thelongitudinal extension of the valve away from the point 0, and in thecase of the'valve in practice, the lateral cone pansion and extension inthe direction away from the thrust bearing, which is at point 0, and thevalve is prevented from binding in its housing.

7 What I claim and desire to secure by Let-,

fit between the valve and its seat J is extend all sides of a expansionof the heated has been offset by the longitudinal ex-.

a cylindrical por- I 'tion of the valve, the small end of said conemerging into said cylindrical portion of the valve, a shaft carried atthe center by said cylindrical portion of said valve and a flat thrustbearing on said cylindrical portion at the opposite end from the cone.

2. The combination in a rotary conical valve for internal combustionmotors comprising a hollow cone shaped member open at the large end, aport in said cone shaped member to register With ports in the housing ofsaid member and a shaft for driving said cone shaped member, of acylindrical portion forming an intermediate portion between said coneshaped member and said 15 In testimony whereof I afliX my signature 26in presence of two Witnesses.

OSMON B. CAMPBELL, JR. Witnesses:

ORVAL J. CUNNINGHAM, HARRAL W. COULTER.

